Lava Burst Travel Speed

I have found after MoP that my lava burst travels very quickly, stretching the spell out and causing it to be very ugly. Is there any reason for the change to this spell and will it ever be reverted to what it was before?

YES. FINALLY SOMEONE ELSE WHO NOTICED. In fact, both Lava Burst and Lightning Bolt are subject to this. The degree it varies from the old (and the current overload animation, as that one doesn't seem to be affected), I have found, varies from race to race. As an example, Draeneis Lava Bursts are barely visible (and the LBs don't appear before in mid fight), while Dwarves's barely deviate at all.

Yes, I tested this, and I based my choice of race on it. Something along the lines of: Dwarves > Taurens > Orcs > rest (rest are at around the same level, I found). And before anyone questions it: I did this on the training dummies in Orgrimmar, with pots of Illusion, meassuring the difference depending on distance from target (meassured in tiles, very handy), time before LBs would appear (for Dwarves, they appear right at where the dwarf lets go of the spell; for Draeneis, halfway through the cast). I also recorded this to compare the results in spell density, and I'm fairly confident in my results.

I wish they would fix this - I've submitted near a hundred bug reports at this point ever since the launch, still hoping though.

I notice on my mage also has this problem with a lot of its spells. Searching around the internet I can find no other forum posts about this problem, so I doubt it has been brought to Blizzard's attention.

It's cast order. When you cast Lava Burst first, even though it hasn't hit the target yet, the target 'knows' it will be getting hit, and apply its modifiers then (or at least that is how it seems). Hence you can see it as there being no real travel time from cast to impact, but instead you get a delay on damage to simulate travel time.